Middleware/resolver execution hangs after some time

[mathieuprog]

We're experimenting with middlewares and we created a middleware that sleeps for 2 seconds before continuing, and added it as first middleware to run in the middleware chain:

defmodule MyApp.Schema.Middleware.TestMiddleware do
  @behaviour Absinthe.Middleware

  def call(resolution, _opts) do
    IO.inspect "--> hello"
    Process.sleep(2000)
    IO.inspect "--> world"
    resolution
  end
end

def middleware(middleware, _field, _object) do
  [Middleware.TestMiddleware, Middleware.Authenticate | middleware]
end

After approximately the 5th print of "--> hello" on my machine, "--> world" is no longer printed and the execution just seems frozen, without any error raised.

I expected to see at least some error, like a timeout error.

Any idea as to why it behaves like that?

Environment

• Elixir version:

Erlang/OTP 24 [erts-12.0] [source] [64-bit] [smp:12:12] [ds:12:12:10] [async-threads:1] [jit]
Elixir 1.12.3 (compiled with Erlang/OTP 22)

• Absinthe version:

"1.7.0"

[benwilson512]

Hi @mathieuprog, Absinthe itself does not introduce any timeouts. Can you show a complete example that I can run?